I had a 1980s 9.9 mercury and have a 1980s Mariner which it is my understanding was a Mercury engine built in Japan. Not sure if that’s right not interested enough to investigate. Had to get and install new cowl for the Mariner couple years ago as I inherited it with broken tiller from my dad who dropped it and broke cowl where it attached to tiller. Cowl was all cast aluminum. I wanted to run it without console controls. Can still find parts for 1980s machines at reasonable prices. These 2 strokes have run so well for me in warm/freezing, freshwater/salt water over the years I traded the Merc 9.9 for a new 4 stroke Merc 20. Wanted more power but still have 20 hp restricted areas I like. Kept the Mariner because it is actually a 15 with a 9.9 cover and don’t need two 9.9s but always good to have a backup outboard during duck season.